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JEE Main & Advanced Physics Wave Mechanics Question Bank Doppler's Effect

  • question_answer
    A source of frequency 150 Hz is moving in the direction of a person with a velocity of 110 m/s. The frequency heard by the person will be (speed of sound in medium = 330 m/s)                            [CPMT 1989; RPET 2001]

    A)            225 Hz                                     

    B)            200 Hz

    C)            150 Hz                                     

    D)            100 Hz

    Correct Answer: A

    Solution :

               \[n'=\frac{v}{v-{{v}_{s}}}\times n=\left( \frac{330}{330-110} \right)\times 150=225\,Hz\]


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